FT1000MP & MarkV
Using the HAL ST-8000 HF Modem With the Yaesu FT-1000MP Transceiver and RTTY by
The HAL ST-8000 is a high-end RTTY unit. It contains no DSP, but the quality of
its filters is well known. These units are showing up at flea markets, and
sometimes those selling them have no idea what they're worth. If you see one in
good shape at a flea, think about picking it up!
With lots of internal DIP switches, the ST-8000 is able to accommodate many
types of transceivers. Getting these settings just right is a bit of work. This
document explains the settings I used in the ST-8000, related FT-1000MP settings
and the configuration of the RTTY software by WF1B to talk with the modem.
It is my hope that this information is useful to someone else who needs to set
up the same combination. Perhaps they'll have an easier time than I did!
My interconnects make the following assumptions:
FSK signaling operation
Connections made to RTTY jack on FT-1000MP only
ST-8000 Switch Settings
Receiver Related Switch Settings
Since I pull audio from the fixed-level output on the RTTY jack of the
FT-1000MP, I set the switches in bank S1 as follows:
These settings are for 600 ohm impedance, unbalanced. Note: the audio is fed
into a 1/4" headphone jack. Connect the tip of the plug to the RX Audio from the
FT-1000MP, and the other two connections to ground. Failing to ground the middle
ring will result in no RX decode.
FSK Transmit Settings
Having S2-1 in the ON position resulted in a lack of shift signal.
Front Panel Settings
The Front panel of the ST-8000 provides lots of things that can be twiddled.
Here are the settings I use, at least as a starting point:
KOS OFF (center position)
Print Squelch: Full counterclockwise
Detector: FM M/S
Mark Frequency: 2125
Space Frequency: 2295
Input Baud: 45
Output Baud: 45 (not used)
Diversity: full counterclockwise
The only setting affected on the FT-1000MP, is the FSK Keying. The ST-8000
switch settings above require the FSK Keying on the FT-1000MP be set to Normal.
RTTY by WF1B Configuration
Below are the relevant portions of the RTTY.INI file. Some of the lines here
probably are not needed and may be left from running with a P-38. I'll try to
whittle the list down to the bare essentials.
Obviously you'd replace the com port settings with whatever com port you wanted
to use. The BAUDOT-DRV setting will result in 5 bit baudot passing over the COM
port between the ST-8000 and the computer.
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